Improvement in whiffletrees



C. D. SMITH.

WHIFFLETREE.

Patented July 3, 1877.

' ".PUERS. PHOTO-LYHOGRAPHER. WASNlNGlDN. D. C

Unrrnn 1.. warns GOE D. SMITH, OF SMITHTON BRANCH, NEW YORK.

IMPROVEMENT IN WHIFFLETREES.

Specification forming part of Letters Patent No. 192,662, dated July 3,1877; application filed May 16, 1877.

' which is placed above and the other below the pole, and thesingle-trees are placed between the upper and lower parts of thedouble-tree, ..-d are attached thereto by means of pivotpins, which passthrough these parts and hold them together.

By this arrangement the whole of the parts of the whiffletrees'are heldfirmly and evenly in their proper horizontal planes, and not permittedto tip and twist out of place, as is common when the single-trees anddoubletrees are connected together by means of hooks, rings, clevises,&c., as they usually are.

The double-tree is formed of two fiat pieces, such as any farmer caneasily procure or manul'acture.

The invention will be easily understood by reference to the accompanyingdrawings, of which- Figure 1 is a plan of a pair of the improvedwhiffletrees, with a wagon-tongue, to which they are attached. Fig. 2 isa front elevation of the same.

The doubletree is formed of two pieces, A and A, one of which is placedabove and the other below the pole B, to which they are coupled by meansof the bolt or pin a, which passes through A, A, and B. This bolt shouldhave ahead on its upper end and a not on its lower end, so as to holdthe parts securely together. Between the outer ends of the pieces A andA are placed the sin gle-trees D, which are attached to the double-treeby means of the bolts d d that pass through both of the parts A and Aand D, and hold them socurely together.

The bolts a and 01 should be round, so as to allow a free forward andbackward play of the parts. The bolts d have two seats, 01 and d, in theouter ends of the double-tree, and slots (2 connect these two seatstogether, while I springs E close the said slots against the passage ofthe bolts 12, except when force is used to press the bolt d from one tothe other of the said seats (1 0r 0?.

By this arrangement either of the singletrees may be moved farther orless far toward the end of the double-tree, at pleasure, so as toequalize the draft when horses of unequal strength are working together,or both singletrees may be placed farthest from or nearest to thecenter-pin a, so as to drive the team

